<template>
  <div class="course-list">
    <el-card>
      <template #header>
        <div>
          <span>数据筛选</span>
        </div>
      </template>

      <el-form
        ref="form"
        label-width="70px"
        label-position="left"
        :model="filterParams"
      >
        <el-form-item label="课程名称" prop="courseName">
          <el-input v-model="filterParams.courseName"></el-input>
        </el-form-item>
        <el-form-item label="状态" prop="status">
          <el-select v-model="filterParams.status">
            <el-option label="全部" value=""></el-option>
            <el-option label="上架" value="1"></el-option>
            <el-option label="下架" value="0"></el-option>
          </el-select>
        </el-form-item>
        <el-form-item>
          <el-button :disabled="loading" @click="handleReset">重置</el-button>
          <el-button type="primary" :disabled="loading" @click="handleFilter"
            >查询</el-button
          >
        </el-form-item>
      </el-form>
    </el-card>

    <el-card>
      <template #header>
        <div>
          <span>查询结果：</span>
          <el-button
            style="float: right; margin-top: -5px"
            type="primary"
            @click="
              $router.push({
                name: 'course-create',
              })
            "
            >添加课程</el-button
          >
        </div>
      </template>
      <el-table
        :data="courses"
        v-loading="loading"
        style="width: 100%; margin-bottom: 20px"
      >
        <el-table-column prop="id" label="ID" width="50"> </el-table-column>
        <el-table-column prop="courseName" label="课程名称" width="120">
        </el-table-column>
        <el-table-column prop="price" label="价格"> </el-table-column>
        <el-table-column prop="sortNum" label="排序"> </el-table-column>
        <el-table-column prop="status" label="上架状态">
          <template #default="scope">
            <el-switch
              v-model="scope.row.status"
              active-color="#13ce66"
              inactive-color="#ff4949"
              :active-value="1"
              :inactive-value="0"
              :disabled="scope.row.isStatusLoading"
              @change="onStateChange(scope.row)"
            />
          </template>
        </el-table-column>
        <el-table-column prop="price" label="操作" width="180" align="center">
          <template #default="scope">
            <el-button
              @click="
                $router.push({
                  name: 'course-edit',
                  params: {
                    courseId: scope.row.id,
                  },
                })
              "
              >编辑</el-button
            >
            <el-button
              @click="
                $router.push({
                  name: 'course-section',
                  params: {
                    courseId: scope.row.id,
                  },
                })
              "
              >内容管理</el-button
            >
          </template>
        </el-table-column>
      </el-table>
      <el-pagination
        background
        layout="prev, pager, next"
        :total="totalCount"
        :disabled="loading"
        @current-change="handleCurrentChange"
      />
    </el-card>
  </div>
</template>

<script lang="ts">
import { defineComponent } from "vue";
import { getQueryCourses, changeState } from "@/services/course";

export default defineComponent({
  name: "CourseList",
  data() {
    return {
      filterParams: {
        currentPage: 1,
        pageSize: 10,
        courseName: "",
        status: "",
      },
      courses: [],
      totalCount: 0,
      loading: true,
    };
  },

  created() {
    this.loadCourses();
  },

  methods: {
    async loadCourses() {
      this.loading = true;
      const { data } = await getQueryCourses(this.filterParams);
      data.data.records.forEach((item: any) => {
        item.isStatusLoading = false;
      });
      this.courses = data.data.records;
      this.totalCount = data.data.total;
      this.loading = false;
    },

    handleCurrentChange(page: number) {
      this.filterParams.currentPage = page;
      this.loadCourses();
    },

    handleFilter() {
      this.filterParams.currentPage = 1;
      this.loadCourses();
    },

    handleReset() {
      (this.$refs.form as any).resetFields();
      this.filterParams.currentPage = 1;
      this.loadCourses();
    },

    async onStateChange(course: any) {
      course.isStatusLoading = true;
      const { data } = await changeState({
        courseId: course.id,
        status: course.status,
      });
      this.$message.success(`${course.status === 0 ? "下架" : "上架"}成功`);
      course.isStatusLoading = false;
    },
  },
});
</script>

<style lang="scss" scoped>
.el-card {
  margin-bottom: 20px;
}
</style>
